Pump.



H. WANAMAKER.

. UMP.

APPLICATION m50 Amma, lens.

1,303,621. A Panama My13,1919.

y Arrow/ys HENRY WANAMAKER, 0F ALBANY, NEW YORK.

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Specification of Letters Patent.

Patented May 13, 1919.

` "Application mangstie, 1915. serial No. 45,731.

To all whom t may Concern:

Be it known that I, HENRY WANAMAKnn, of Albany, in the county of Albany, and 1n the State of New York, have invented a certain4 new and useful Improvement `in Pumps,

and do hereby declare that the following is a full, clear, and exact descriptionthereof.`

My invention relates to pumps and" has for its object to provide a simple, `eiicient pump adapted to discontinue its pumping operation automatically when a predetermined pressure is attained. Although applicable for many purposes, it is particularly ad` vantageous when embodied in apparatus for inflating automobile tires, and such embodiment has been chosen for purposes 4of illuse tration.

@ther and further" objects of my invention` will be apparent from thefollowing description of the above-mentioned embodiment and from an inspection of the accompanying Fig. 2 a plan of the embodiment shown` in Fig. 1; and

Fig. 3 a perspective of the illustrated embodiment mounted on an automobile. e n Similar reference characters referto simie lar parts throughout the drawings.

The embodiment illustrated in the drawings comprises a double-acting pump of 'any desired type having cylinders 1, pistons 2, piston rods 3, andfcrank shaft 4l. The crank shaft may be connected to a source of power and its movement controlled in any desired manner. In the embodiment illustrated, the outer end of said crankshaft 4 has splined thereon a gear k5 provided with a circular flange 6 which extends over an extension 7 on cylinder 1, thereby vforming an inclosed circular pocket in contact with `the outlet of a by-pass 8 in the side wallof said cylinder 1. Gear 5 is adapted to engage with and be disengaged from a pinion 9 fixed to any moving part, as shaft` 10. In this embodiment, gear 5 normally is held in inoperative position by an armature or latch 12 controlled by magnets or solenoidsl adapted to be energized by the closing of a circuit 14 through the instrumentality of a button 15. The momentary closing of circuit 14 will energize said magnets or solenoids 13 thereby retracting latch 12 from the path 'of gear 5 which then will be forced into mesh with pinion 9 by spring 11 and maintained in mesh until forced into inoperative position as hereinafter described. A handle 16 also is connected to latch 12 in order to operate the same if current should fail or if magnet or solenoid 13 should get out of order. The pump is provided with ordinary intake and outlet valves 2O and 21 respectively, the latter of which opens linto a chamber 22. The ordinary outlet for chamber 22 is provided with a pipe 23 which may lead to any desired place. Said chamber 22 `also is provided with an excess pressure port 24: leading into a recess or larger area 25 which communicates with by-pass 8. The port and by-pass normallyare closed by 'a valve or piston 26 controlled by aspring 27 which may be adjusted and set by a screw 28 to suit the required maximum pressure. It will be noted that port 241s of `much less diameter than recess 25, which will cause by-pass 8 tobe uncovered very quickly as soon as a predetermined pressure is attained, thereby increasing the accuracy with which the pump will cease its operation at the desired predetermined press-ure. i

A convenient adaptation to automobiles of the tire pumping embodiment of my invention isl illustrated in Fig. `3 of the drawings.

The pump is mounted in any convenient.

place in the hood adjacent to a moving shaft, as the magneto or fan shaft, on which pinion 9 may be secured. Current for circuit 1-1 may be obtained from any battery source which may be `in service; suchas the starting or the lighting batteries. Pipe 23 leads to the inside ofthe dash, ending in a` stopcock 30 adjacent to which is secured a pressure gage 31.` The operation of this embodiment is as follows:

To test the pressure at which the pump will discontinue its pumping operation, stopcoclr 30 is closed and button 15 pressed, which will lift latch 12, permitting spring 11 to throw gear 5 into mesh with pinion 9 which is revolving with the magneto or other shaft to which it is secured. Thisstarts the opera-tion of the pump, and stop-cock 30 being closed, the air will be compressed in chamber 22 and pipe 23 until the pressure is suficient to open valve 26 ,against the force of its spring 27 sufficiently to uncover bypass 8. The air then will enter the by-pass and throw-gear 5 into inoperative position where it will be held by latch 12 falling into position in the path thereof. Pressure gage gear into mesh with said rotating gear, and means to retain said splined gear in inoperative position comprising a latch.

13. The combination of a pump, a crank shaft, means to operate said crank shaft and said pump comprising a gearing, one of said gears being secured to a rotating part and the other of said gears being splined to said crank shaft, means to force said splined gear into mesh With said rotating gear, and means to retain said splined gear in inoperative position comprising a latch and means to operate said latch.

14. The combination of a pump, a crank shaft, means to operate said crank shaft and said pump comprising a gearing, one of said gears being secured to a rotating part and the other of said gears being splined to said crank shaft, means to force said splined gear into mesh vvith said rotating gear, and means to retain said splined lgear in inoperative position comprising a latch and means to operate said latch comprising a solenoid.

15. `The comb-ination of a pump", means to oper-ate said pump comprising a driving part and a driven part, and means to discontinue the pumping operation when a predetermined pressure is attained comprising an air pocket on a driven part adapted to receive air pressure to disconnect said part.

16. The combination of a pump, means to operate said pump comprising a shaft, a driven part provided With an air pocket mounted on said shaft, means to discontinue the pumping operation When a predeter mined pressure is attained comprising means to admit air pressure to said pocket to move said driven part to inoperative position.

17. The combination of a pump, means to operate said pump, a chamber, a port leading from said chamber, a recess connected to said port, a by-pass leading from said recess, and a spring pressed valve closely fitting said recess and adapted to close said port and overlap said by-pass When in closed position.`

18. The combination of a pump, means to operate said pump, a chamber, a port leading from said chamber, a recess connected to said port, a by-pass leading from said recess, a spring pressed valve closely litting` said recess and adapted to close said port and overlap said by-pass when in closed position and means to regulate the pressure necessary to operate said spring pressed valve to open said port and uncover said by-pass.

In testimony that I claim the foregoing I have hereunto set my hand.

HENRY WANAMAKER.

Witnesses G. A. CLARE, GEO. A. SAGER.

Copies of this patent may be obtained for ve cents each, by addressing the "Commissioner of Patents, Washington, D. G. 

